Social media platforms have different optimal image formats, but they share one universal truth: posts that combine multiple images into a single, well-designed grid consistently outperform single-image posts in engagement, reach, and shareability. The reason is simple: a grid post delivers more visual information in the same screen real estate, giving viewers more reasons to stop scrolling, more details to process, and more incentive to engage. Platform-specific grid strategies: Instagram feed — 2×2 square grid at 2048×2048px. The square format fills maximum screen real estate in the grid view, and four cohesive images in one post create a professional, curated aesthetic that signals quality to potential followers. For carousel cover images, a 2×3 grid at 1080×1350px (4:5 portrait) serves as the first slide that previews the content of the entire carousel. Facebook — 1×3 horizontal grid at 2048×1000px. Facebook's link preview and feed display favor landscape-oriented images, and a horizontal grid showing three related images (product variants, before-during-after, event highlights) drives higher click-through rates than single hero images. LinkedIn — 2×2 grid at 1200×1200px. LinkedIn's professional audience responds to clean, information-dense grids: data visualizations, portfolio samples, process documentation, and team highlights all perform well in square grid format. X/Twitter — 1×4 horizontal strip at 2048×800px. Twitter's feed displays horizontal images beautifully, and a four-image strip showing a sequence, timeline, or comparison occupies premium scroll real estate without requiring users to click through a thread. Pinterest — 2×3 grid at 1000×1500px (2:3 ratio). Pinterest's recommended pin ratio maximizes visibility in search results and related pin feeds, and a grid showing multiple related images (outfit components, recipe steps, room decor elements) creates highly saveable, shareable pins. MergeFrame handles the cross-platform workflow: create one grid, export at multiple resolutions for different platforms, maintain consistent visual quality across your entire social presence. The local processing architecture means your pre-published content — unreleased products, campaign materials under embargo, client work not yet public — stays completely confidential until you choose to publish.